CN-121993715-A - High-integration multifunctional ground tester lubricating system and working method thereof

CN121993715ACN 121993715 ACN121993715 ACN 121993715ACN-121993715-A

Abstract

The invention discloses a high-integration multifunctional ground tester lubrication system and a working method thereof, and belongs to the technical field of ground tests of accessory transmission systems of aeroengines. The system takes a lubricating oil tank as a core, integrates three core functional flow paths by optimizing the layout of a pipeline and a valve, namely a self-circulation filtering flow path, realizes off-line efficient purification of lubricating oil by utilizing a circulating pump and a series multistage oil filter, and realizes uniform and controllable preheating of the lubricating oil by a product oil supply and cleanliness monitoring flow path, a controllable multi-way valve group and an online particle counter, wherein the lubricating oil cleanliness of an inlet and an outlet of the product can be flexibly switched and monitored in real time on the premise of not interrupting a test, and a self-circulation heating flow path is matched with a thermostat through the circulating pump. The three flow paths share the core power source (circulating pump group) and the oil tank, and the mode selection is carried out through a central switching valve, so that the high integration of functions and the optimal allocation of resources are realized. The invention solves the problems of single function, inconvenient cleanliness monitoring and low heating efficiency of the traditional test lubrication system, remarkably improves test preparation efficiency, process monitoring capability and result reliability, and provides key guarantee for high-standard aviation transmission accessory test.

Inventors

REN YI
SUN HUIYING
WAN XIAOWEN
LI ZHEN
ZHANG JIXING
SUN HAIHANG

Assignees

中国航发哈尔滨东安发动机有限公司

Dates

Publication Date: 20260508
Application Date: 20260225

Claims (10)

1. A highly integrated, multi-functional ground tester lubrication system, said system being constructed around a lubrication tank and incorporating three interrelated and independently or cooperatively operable functional fluid paths, comprising: the self-circulation filtering flow path is driven by the circulating pump set and comprises a series filtering branch consisting of at least two oil tank side oil filters with different filtering precision, and the series filtering branch is used for performing off-line circulation purification on the lubricating oil in the oil tank when the test product does not work; The product oil supply and cleanliness monitoring flow path is driven by the oil supply pump set and comprises a cleanliness collector with a bypass structure, and the collector can be selectively connected in parallel to a product oil inlet pipeline or a product oil return pipeline through a controllable multi-way valve group at an oil inlet side and an oil return side so as to realize online and in-situ measurement of the cleanliness of lubricating oil at a product inlet or outlet; The self-circulation heating flow path is also driven by the circulating pump set and comprises a constant-temperature heating device which is used for uniformly and controllably circularly heating the lubricating oil in the oil tank before or during the working of the test product; The system also comprises a flow path switching valve for controlling the oil outlet flow direction of the circulating pump set and selectively guiding the lubricating oil into the self-circulating filtering flow path or the self-circulating heating flow path.
2. The high-integration multifunctional ground tester lubrication system of claim 1, wherein the oil tank side oil filter in the self-circulation filtering flow path is of a multistage series structure and at least comprises a first-stage rough filter and a second-stage fine filter, and the second-stage fine filter has a higher filtering precision than the first-stage rough filter.
3. The highly integrated multi-functional floor tester lubrication system of claim 1, wherein the product oil supply and cleanliness monitoring flow path further comprises: The oil inlet main pipeline is arranged at the downstream of the oil supply pump set and is used for oil filtering; An overflow valve arranged in the flow path for regulating and stabilizing the pressure and flow of the lubricating oil supplied to the product and the collector; And a sensor set for monitoring oil supply temperature, pressure and flow.
4. The lubrication system of the high-integration multifunctional ground tester according to claim 3, wherein the controllable multi-way valve group comprises an oil inlet electric three-way valve and an oil return electric three-way valve, an oil inlet of the collector can be switched and connected to a product oil inlet pipeline or a product oil outlet pipeline by controlling the oil inlet electric three-way valve, and an oil outlet of the collector can be switched and connected to a downstream of the product oil inlet pipeline or an oil return tank pipeline by controlling the oil return electric three-way valve.
5. The high-integration multifunctional ground tester lubrication system of claim 1, wherein the self-circulation heating flow path is provided with a heating flow path dedicated oil filter upstream of the constant temperature heating device.
6. The high-integration multifunctional ground tester lubrication system according to claim 1, wherein the product oil supply and cleanliness monitoring flow path is provided with an oil return oil filter and a check valve for preventing backflow of the oil on a product oil return line.
7. The highly integrated multi-functional floor tester lubrication system of any one of claims 1 to 6, further comprising a radiator integrated in the product oil supply and cleanliness monitoring flow path downstream of the oil supply pump assembly for precise control of the temperature of the lubricating oil supplied to the product in conjunction with the self-circulating heating flow path.
8. The high integration multifunctional floor tester lubrication system according to any one of claims 1 to 6, wherein the cleanliness collectors are built-in with an optical or sensor-based particle counter, and can analyze and output the number concentration or cleanliness class code of different sized particles in the lubricating oil in real time.
9. The highly integrated multi-functional ground tester lubrication system of any one of claims 1 to 6 wherein the volume of the lubrication tank is proportional to or equal to the actual lubrication tank volume of the aircraft engine being simulated.
10. A method of performing a ground test using the lubrication system of any one of claims 1-9, comprising the steps of: The preparation stage before the test comprises the steps of starting the circulating pump set, enabling the lubricating oil to flow through the self-circulating filtering flow path through operating the flow path switching valve, and purifying the lubricating oil in the oil tank, and/or enabling the lubricating oil to flow through the self-circulating heating flow path, and heating the lubricating oil to a preset test starting temperature; The test operation and monitoring stage comprises the steps of starting the oil supply pump set, supplying lubricating oil to a test product, connecting the cleanliness collector in parallel to a product oil inlet pipeline by operating the controllable multi-way valve set, monitoring the supply cleanliness, switching the cleanliness collector to be connected in parallel to the product oil return pipeline, monitoring the oil return cleanliness, and performing comparison analysis with the oil inlet cleanliness; And in the post-test maintenance stage, after the test is finished, the self-circulation filtering flow path is started again, and the working lubricating oil is filtered and purified to prepare for the next test.

Description

High-integration multifunctional ground tester lubricating system and working method thereof Technical Field The invention relates to the technical field of ground simulation tests of aeroengines and transmission accessories (such as gearboxes, bearings and the like) thereof, in particular to a high-integration ground tester lubrication system which is used for providing lubrication for the tests and integrating the functions of lubricating oil cleanliness control, on-line monitoring and temperature management. Background An aviation transmission accessory (hereinafter referred to as a tested product) must undergo a strict ground simulation test before installation to verify performance, durability and reliability under real working conditions. The lubrication system is a key subsystem of the test bed, and the performance of the lubrication system directly influences the effectiveness and safety of the test. The conventional ground tester lubrication system has the following prominent drawbacks: 1. the function is single, the cleanliness control is passive, and the filter mainly depends on a single oil filter on a product inlet and return path, and only has a basic oil supply and return function. The design cannot actively and deeply purify the contaminated lubricating oil in the oil tank when the product is not in operation (test intermittence period). If the cleanliness of the lubricating oil does not reach the standard before the test, the test data is directly distorted and even the product is worn early. 2. The cleanliness monitoring is off-line and inconvenient in that when the cleanliness of the lubricating oil needs to be monitored, the lubricating oil needs to be stopped, manually sampled from a pipeline and sent to an off-line laboratory for analysis by a particle counter. The process is time-consuming, secondary pollution is easy to introduce, real-time and continuous cleanliness data cannot be obtained, and abnormal phenomena such as particle proliferation caused by product abrasion in the test process are difficult to discover in time. 3. The heating mode is inefficient and risky, and a common heating mode is to install a rod-shaped heater on the oil supply pipeline or to heat the bottom of the oil tank. This approach tends to result in localized overheating of the lubricating oil to produce soot, and has low heating efficiency and poor uniformity. The product is started or run for too long in a low-temperature lubricating oil state, and the test risk is brought due to high viscosity and poor lubrication. 4. The system is redundant, the integration level is low, a plurality of sets of independent pump sets, valve members and pipelines are often adopted to meet different functions, the system is complex, the occupied area is large, the cost is high, and the cooperativity among the functions is poor. Therefore, the ground tester lubrication system integrating high-efficiency filtering, on-line monitoring and intelligent temperature control is developed, and is highly integrated and convenient to operate, so that the ground tester lubrication system becomes an urgent need for improving the test quality and efficiency of aviation transmission accessories. Disclosure of Invention The invention aims to overcome the defects of the conventional ground tester lubricating system and provides a high-integration multifunctional ground tester lubricating system. The system aims at achieving the following aims: 1. The active and deep purification of the lubricating oil is realized, namely, in the non-working period of the product, closed loop circulation filtration can be carried out on all the lubricating oil in the oil tank, and the cleanliness grade of the lubricating oil is obviously improved and maintained. 2. The online and flexible monitoring of the lubricating oil cleanliness is realized, the lubricating oil cleanliness of a supplied product can be monitored in real time and in situ without stopping and sampling in test operation, and the lubricating oil cleanliness can be flexibly switched to the monitoring of the oil return cleanliness of the product after working, so that the comparison analysis is carried out. 3. The efficient, uniform and safe heating of the lubricating oil is realized, namely, the lubricating oil is quickly and uniformly heated to the set temperature by adopting a high-flow circulating heat exchange mode to avoid local overheating. 4. The system is highly integrated and intelligently controlled, three functions are realized by optimizing the flow path design and sharing core components and with minimum hardware configuration, and remote, one-key switching and collaborative management of functions are realized by the electric valve and the control system. The invention is characterized in that a lubricating oil tank is used as an oil storage and circulation center, three functional flow paths which share resources and have clear logic are constructed, and the total control is ca